Abstract
Drying of pomegranate arils was done using microwave-vacuum technique, using microwave power of 25 to 95W, vacuum pressure of 25 to 195mmHg and sample mass of 65 to 235g. The effective moisture diffusivity varied from 5.18×10−11 to 6.58×10−10m2/s. Effective moisture diffusivity (Deff) values were found to increase as microwave power increases or sample mass decreases for constant values of remaining variables while vacuum pressure had negligible effect. A third order polynomial relationship was found to correlate the effective moisture diffusivity (Deff) with moisture content. Multivariate polynomial models were also developed for estimating the effective moisture diffusivity as a function of the microwave-vacuum drying process parameters.
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